It is spraypaint, notice the thin coat (no drips and evenly applied) and uniformity of the color across the 1 x 8 tiles, and wings, none of which are made in dark red, yet. The color doesn't match the normal dark-red as noted. I committed sin on a spare copy of Anakin's JSF, and unless you look at it under really good light, or take its picture using a direct flash, its nearly impossible to distinquish that the pieces are in fact painted, and not legit LEGO issued pieces. I used Krylon FUSION (burgundy) color, applying about 5 coats to each piece, and the color is spot on with Lego's dark-red. When viewed under good light, or via a direct flash, the painted pieces have a different "reflection" if you will, and you can tell the difference between the regular ABS in Lego's pieces, versus the slight reflection you get from the painted surface of the custom pieces. Also, unlike most spraypaints, I've found that Krylon FUSION brand actually bonds to the plastic in the pieces, and I've yet to end up scracthing one to the point of needing to repaint it.
Hope that clears up questions anyone may have had.